You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <alllinks galcontinue="LCD_Interfacing" />
  </query-continue>
  <query>
    <pages>
      <page ns="0" title="FC-301 D" missing="" />
      <page ns="0" title="GPIO" missing="" />
      <page pageid="3271" ns="0" title="Cable Compatibility" />
      <page pageid="3293" ns="0" title="Designing a Private APRS System" />
      <page pageid="20" ns="0" title="Digipeater Setup" />
      <page pageid="29" ns="0" title="GTRANS" />
      <page pageid="316" ns="0" title="GTRANS Kenwood TH-D72A" />
      <page pageid="925" ns="0" title="GTRANS Yaesu FTM-350R" />
      <page pageid="12" ns="0" title="Garmin FMI" />
      <page pageid="54" ns="0" title="Garmin Nuvi 350 POI Management" />
    </pages>
  </query>
</api>